[need_a_new_truck]

All of the previous checks were done when the engine was warm. I did check the pressure when the engine was cold this morning and got essentially the same results. The pressure stayed around 60 lbs while reving the engine a little, but it missed a lot more than when it was warm. The one thing I did look at was the fuel pressure needle, and it did not change as the motor was missing. The question I have is why does this motor run better warm at 60 lbs than it does cold at 60 lbs?

I'll do more testing this weekend.

Other things to note.....

1. This motor has always started up great and idles like a new engine. But for the first 2 miles of driving it misses really bad but then decreases substantially as you drive it. Misfire is less noticeable when the motor has been driven 15-20 miles. Outside temp seems to affect it too. Winter colder temps makes the motor's miss more noticeable even when warm.

2. Should also mention that it does have 190000 miles on it.

3. Fuel gauge does not work from Empty to 3/4. Engine was misfiring before I had this problem.

4. I've had this misfiring problem with the truck for almost a year.